在Windows Phone 8.1上获取CivicAddress

Question

我正试图从Windows Phone 8.1中的Geoposition获取CivicAddress

我尝试使用以下代码:

// Get Current Location
var geolocator = new Geolocator();
geolocator.DesiredAccuracyInMeters = 100;
var position = await geolocator.GetGeopositionAsync();

// Get Country
var country = position.CivicAddress.Country;

由于CivicAddress字段为null,因此抛出NullReferenceException.我知道没有为Windows 8提供CivicAddress提供程序.我想检查是否是Windows Phone 8.1的情况.如果是这样,我如何获取/编写CivicAddress提供程序？

Answer 1

您需要使用ReverseGeocoding - MSDN上的更多信息.

至于Windows运行时,您可以为此目的使用MapLocationFinder.FindLocationsAtAsync:

 var geolocator = new Geolocator();
 geolocator.DesiredAccuracyInMeters = 100;
 Geoposition position = await geolocator.GetGeopositionAsync();

 // reverse geocoding
 BasicGeoposition myLocation = new BasicGeoposition
     {
         Longitude = position.Coordinate.Longitude,
         Latitude = position.Coordinate.Latitude
     };
 Geopoint pointToReverseGeocode = new Geopoint(myLocation);

 MapLocationFinderResult result = await MapLocationFinder.FindLocationsAtAsync(pointToReverseGeocode);

 // here also it should be checked if there result isn't null and what to do in such a case
 string country = result.Locations[0].Address.Country;